Messages in this thread | | | From | Neil Brown <> | Date | Wed, 13 Jun 2001 13:00:05 +1000 (EST) | Subject | Re: is there a way to export a fat32 file system using nfs? |
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On Tuesday June 12, covici@ccs.covici.com wrote: > Hi. I seem to remember that at one time in the 2.2 series I was able > to to export fat32 file systems using nfs, but now it doesn't work > anymore.
No, it doesn't.
It did in early 2.2 due to some fairly ugly hacks which just had to go. They worked in a lot of simple cases, but it wouldn't be too difficult to confuse such a server so that it would start losing files.
It would be possible to add to 2.4.5, but not easy. The basic problem is that you cannot create a reliable NFS filehandle for a file in a FAT filesystem as there are no inode numbers or anything similar.
What might work would be:
In fat_fill_inode, set i_generation to the current time.
When creating a filehandle, store: i_ino i_generation i_location i_logstart
When when asked to lookup a filehandle: Call find_inode(i_ino). If this finds something check i_generation. If it matches, SUCCESS.
Call fat_iget(i_location). If this finds something, check i_logstart. If it matches, assume SUCCESS.
Then comes the tricky bit: read the directory entry indicated by i_location, check the i_logstart is right, if it is, try to get it into the inode cache properly. It is something that I would like to do, but I have lots of other things that I want to do at the moment.
NeilBrown
> > If I remember correctly, I get "get: operation not permitted" when > trying to export the directory in question. > > I am using 2.4.5. > > Any assistance would be appreciated. > > -- > John Covici > covici@ccs.covici.com > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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